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Measuring Ice Core Temperatures

Marine biologist Mette Kaufman measures the temperature of a recently-drilled ice...

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Elevator Rudists

These "elevator" rudists, an ancient bivalve, used one long heavy valve to anchor...

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Recliner Rudists

Where ocean currents were strong, ancient rudist “recliners” lay unattached on...

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Rudist Clams

Rudist clams are mollusks that went extinct about 65 million years ago. They were...

Lesson Plan

Where Have All the Glaciers Gone?

Students will describe how climate change is affecting sea ice, vegetation, and...

Lesson Plan

The Puzzle of Ice Age Americans

Students describe alternative theories for arrival of first humans to come to...

Lesson Plan

The Methane Circus

Students will describe the overall events that occurred during the Cambrian...

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Carbonate Reef (Cretaceous Period: 145 - 65 Million Years Ago)

This illustration shows the edge of a warm inland sea during the Cretaceous Period,...